【摘要】：滲流現象在工程各個領域廣泛存在,實踐證明許多事故都是由滲流引起的,因此對滲流場進行預測及分析具有廣泛而深遠的意義。本文主要從以下幾個方面對問題進行分析和闡述：(1)以前此類問題的研究往往忽略了非飽和土體基質吸力對滲流的影響,導致計算結果與實際存在一定偏差。為了使模擬結果更加符合實際,本文將飽和區(qū)與非飽和區(qū)統(tǒng)一考慮,在達西定律的基礎上建立飽和-非飽和滲流模型,以測壓管水頭及飽和度為變量對滲流場進行研究,滲流場的浸潤線根據飽和度分布自動進行捕捉。(2)采用FORTRAN語言編寫飽和-非飽和滲流計算程序,以ANSYS軟件為基礎,對研究對象進行實體建模,將單元節(jié)點信息導入SP程序的前處理模塊并生成單元拓撲關系文件,調用主程序進行計算并通過TECPLOT軟件輸出計算結果。(3)參照前人的研究成果,選取兩個典型的算例對SP程序的準確性進行驗證。(4)以三個近期完工的大壩為例,分別對其低滲介質中的滲流采用SP程序進行數值模擬并對模擬結果進行分析,為滲流場預測以及工程防滲提供一定的參考。本文的研究成果是,將滲流場的飽和區(qū)與非飽和區(qū)統(tǒng)一考慮,建立了飽和-非飽和滲流模型,采用FORTRAN語音編制了相關的計算程序并對前處理以及后處理模塊進行了一定優(yōu)化,通過實例驗證說明該程序是準確可靠的,應用該程序有針對性的對大壩低滲介質進行數值模擬。
[Abstract]:Seepage phenomenon exists widely in various fields of engineering, and it is proved that many accidents are caused by seepage flow, so it is of great significance to predict and analyze seepage field. In this paper, the problems are analyzed and expounded in the following aspects: (1) the influence of the suction of unsaturated soil matrix on seepage is often neglected in the previous studies, which leads to the deviation between the calculation results and the actual situation. In order to make the simulation results more in line with the reality, the saturated and unsaturated regions are considered in this paper. Based on Darcy's law, a saturated-unsaturated seepage model is established. The seepage field is studied with the water head and saturation of the pressure measuring tube as variables. The infiltration line of seepage field is automatically captured according to the saturation distribution. (2) the saturated-unsaturated seepage calculation program is compiled by FORTRAN language, and the entity modeling of the research object is carried out on the basis of ANSYS software. The unit node information is imported into the preprocessing module of SP program and the unit topology relation file is generated. The main program is called to calculate and output the calculation result through TECPLOT software. (3) referring to the previous research results, Two typical examples are selected to verify the accuracy of SP program. (4) taking three recently completed dams as examples, the seepage in low permeability medium is simulated by SP program and the simulation results are analyzed. It provides a certain reference for seepage field prediction and engineering seepage prevention. The research result of this paper is that the saturated-unsaturated seepage model is established by considering the saturation region and the unsaturated region of seepage field, and the relevant calculation program is compiled by using FORTRAN speech, and the preprocessing and post-processing modules are optimized to a certain extent. The program is proved to be accurate and reliable by an example. The application of the program can be used to simulate the low permeability medium of the dam.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TV64

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本文編號：2169745